Rise in a relative price or inflation?
When there is scarcity (insufficient supply) of commodities, transport, semiconductors, or a rise in energy prices due to the energy transition, at equilibrium there is a rise in the relative price (of commodities, transport, semiconductors, energy). But a rise in a relative price is not inflation, it is an adjustment of a relative price to the shortfall in the supply of the corresponding good or service. For the rise in a relative price to turn into inflation, it must trigger a lasting upward trend in prices, which requires strong indexation of nominal wages to prices. If nominal wage indexation to prices is weak, there is just a “bump” in inflation when the relative price adjusts. If it is strong, inflation can rise permanently. For the time being, wage indexation to prices in OECD countries remains weak.